APA-THE ENGINEERED WOOD ASSOCIATION
This is a listed siding assembly. Listing 8140-2020:0002. This site cites OSFM BML. Match the model and orientation.
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APA 303 reverse-board-and-batten plywood siding has OSFM listing 8140-2020:0002 for a specified panel construction.
The listing pairs that face pattern with shiplap edges and nominal 19/32-inch thickness, identified as 19/32 Performance Category, or greater. Keep the nominal designation and Performance Category together when matching a panel specification. The description allows grooves spaced at least twelve inches on center or panels without grooves.
The veneer construction is also part of the description. Face, back and center veneers are Douglas Fir; cross plies use PS1 Group 1 or 2 species. Panel size is four feet by eight feet or taller. A purchase therefore needs more than the APA name: the face pattern, edge joint, category designation, groove spacing, veneers and panel size all belong to this listing.
For a siding specification, match the proposed panel to those details and consult the manufacturer's installation instructions and product data sheets. Confirm the exact assembly in the live BML system before ordering.